Patents by Inventor Mayumi Yokoi
Mayumi Yokoi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11066343Abstract: Provided is a method for producing p-xylene, comprising: a provision step of providing a C4 fraction comprising at least isobutene as a product formed by fluidized catalytic cracking of a heavy oil fraction; a dimerization step of bringing a first raw material comprising the isobutene into contact with a dimerization catalyst to produce a C8 component comprising a dimer of isobutene; and a cyclization step of bringing a second raw material comprising the C8 component with a dehydrogenation catalyst to produce p-xylene through a cyclization/dehydrogenation reaction of the C8 component.Type: GrantFiled: November 16, 2017Date of Patent: July 20, 2021Assignee: ENEOS CORPORATIONInventors: Yasuhiro Araki, Mayumi Yokoi, Ryoji Ida, Atsushi Segawa, Masanari Akiyama
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Publication number: 20210009488Abstract: A method for producing p-xylene, comprising: a dimerization step of bringing a first raw material comprising isobutene into contact with a dimerization catalyst to generate C8 components comprising diisobutylene; a cyclization step of bringing a second raw material comprising the C8 components into contact with a dehydrogenation catalyst comprising Pt in the presence of hydrogen to obtain a reaction product comprising p-xylene; and a collection step of collecting p-xylene from the reaction product.Type: ApplicationFiled: March 19, 2019Publication date: January 14, 2021Applicant: ENEOS CorporationInventors: Ai MINODA, Masanari AKIYAMA, Yasuhiro ARAKI, Masakazu IKEDA, Mayumi YOKOI
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Publication number: 20190263731Abstract: Provided is a method for producing p-xylene, comprising: a provision step of providing a C4 fraction comprising at least isobutene as a product formed by fluidized catalytic cracking of a heavy oil fraction; a dimerization step of bringing a first raw material comprising the isobutene into contact with a dimerization catalyst to produce a C8 component comprising a dimer of isobutene; and a cyclization step of bringing a second raw material comprising the C8 component with a dehydrogenation catalyst to produce p-xylene through a cyclization/dehydrogenation reaction of the C8 component.Type: ApplicationFiled: November 16, 2017Publication date: August 29, 2019Applicant: JXTG Nippon Oil & Energy CorporationInventors: Yasuhiro ARAKI, Mayumi YOKOI, Ryoji IDA, Atsushi SEGAWA, Masanari AKIYAMA
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Patent number: 9988585Abstract: A method for producing a base oil for lubricant oils comprising: a first step of hydrocracking a stock oil having a content percentage of a heavy matter of 80% by mass or more so that a crack per mass of the heavy matter is 20 to 85% by mass, to obtain a hydrocracked oil comprising the heavy matter and a hydrocracked product thereof, a second step of fractionating the hydrocracked oil into a base oil fraction comprising the hydrocracked product and a heavy fraction comprising the heavy matter and being heavier than the base oil fraction, respectively, a third step of isomerization dewaxing the base oil fraction from the fractionation in the second step to obtain a dewaxed oil, wherein the heavy fraction from the fractionation in the second step is returned to the first step as a part of the stock oil.Type: GrantFiled: November 5, 2013Date of Patent: June 5, 2018Assignee: JX NIPPON OIL & ENERGY CORPORATIONInventors: Kazuaki Hayasaka, Yoshiyuki Nagayasu, Marie Iwama, Mayumi Yokoi, Tomohisa Hirano
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Patent number: 9840672Abstract: A method for producing a hydroisomerization catalyst includes a first step of preparing a support precursor by heating a mixture containing an ion-exchanged zeolite and a binder, the ion-exchanged zeolite being prepared by ion-exchanging an organic template-containing zeolite which contains an organic template and has a one-dimensional pore structure including a 10-membered ring in a solution containing ammonium ions and/or protons, at a temperature of 250 to 350° C. under N2 atmosphere, and a second step of preparing a hydroisomerization catalyst, which is prepared by calcining a catalyst precursor, the catalyst precursor being prepared based on the support precursor containing a platinum salt and/or a palladium salt, at a temperature of 350 to 400° C. in an atmosphere containing molecular oxygen, the hydroisomerization catalyst containing a support which includes a zeolite and carries platinum and/or palladium.Type: GrantFiled: March 29, 2013Date of Patent: December 12, 2017Assignee: JX NIPPON OIL & ENERGY CORPORATIONInventors: Yoshiyuki Nagayasu, Kazuaki Hayasaka, Mayumi Yokoi, Koshi Takahama
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Patent number: 9458387Abstract: A Fischer-Tropsch synthesis reaction catalyst includes a catalyst support containing a silica and zirconium oxide in an amount of 0.5 to 14% by mass based on the mass of the catalyst support, and cobalt metal and a cobalt oxide supported on the catalyst support in an amount equivalent to 10 to 40% by mass of tricobalt tetroxide based on the mass of the catalyst, wherein the degree of reduction of the cobalt atoms is within a range from 75 to 93%, and the amount of hydrogen gas adsorption per unit mass of the catalyst at 100° C. is within a range from 0.40 to 1.0 ml/g.Type: GrantFiled: March 14, 2012Date of Patent: October 4, 2016Assignees: Japan Oil, Gas and Metals National Corporation, INPEX CORPORATION, JX Nippon Oil & Energy Corporation, Japan Petroleum Exploration Co., Ltd., COSMO OIL CO., LTD., NIPPON STEEL & SUMIKIN ENGINEERING CO., LTD.Inventors: Yoshiyuki Nagayasu, Hideki Ono, Kazuaki Hayasaka, Mayumi Yokoi
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Publication number: 20150368569Abstract: A method for producing a base oil for lubricant oils comprising: a first step of hydrocracking a stock oil having a content percentage of a heavy matter of 80% by mass or more so that a crack per mass of the heavy matter is 20 to 85% by mass, to obtain a hydrocracked oil comprising the heavy matter and a hydrocracked product thereof, a second step of fractionating the hydrocracked oil into a base oil fraction comprising the hydrocracked product and a heavy fraction comprising the heavy matter and being heavier than the base oil fraction, respectively, a third step of isomerization dewaxing the base oil fraction from the fractionation in the second step to obtain a dewaxed oil, wherein the heavy fraction from the fractionation in the second step is returned to the first step as a part of the stock oil.Type: ApplicationFiled: November 5, 2013Publication date: December 24, 2015Applicant: JX NIPPON OIL & ENERGY CORPORATIONInventors: Kazuaki HAYASAKA, Yoshiyuki NAGAYASU, Marie IWAMA, Mayumi YOKOI, Tomohisa HIRANO
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Publication number: 20150057478Abstract: A method for producing a hydroisomerization catalyst includes a first step of preparing a support precursor by heating a mixture containing an ion-exchanged zeolite and a binder, the ion-exchanged zeolite being prepared by ion-exchanging an organic template-containing zeolite which contains an organic template and has a one-dimensional pore structure including a 10-membered ring in a solution containing ammonium ions and/or protons, at a temperature of 250 to 350° C. under N2 atmosphere, and a second step of preparing a hydroisomerization catalyst, which is prepared by calcining a catalyst precursor, the catalyst precursor being prepared based on the support precursor containing a platinum salt and/or a palladium salt, at a temperature of 350 to 400° C. in an atmosphere containing molecular oxygen, the hydroisomerization catalyst containing a support which includes a zeolite and carries platinum and/or palladium.Type: ApplicationFiled: March 29, 2013Publication date: February 26, 2015Applicant: JX NIPPON OIL & ENERGY CORPORATIONInventors: Yoshiyuki Nagayasu, Kazuaki Hayasaka, Mayumi Yokoi, Koshi Takahama
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Patent number: 8758596Abstract: A first hydroisomerization catalyst contains a support being a extruded product prepared by calcination having a thermal treatment that includes thermally treating at 350° C. or more and at least one metal supported on the support and selected from the group consisting of metals belonging to Groups 8 to 10 of the periodic table, molybdenum and tungsten, wherein the support contains (a1) a calcined zeolite prepared by calcination having a thermal treatment that includes thermally treating at 350° C. or more of an ion-exchanged zeolite obtained by ion exchange of an organic template-containing zeolite containing an organic template and having a 10-membered ring one-dimensional porous structure in a solution containing ammonium ions and/or protons, and (b1) a calcined inorganic oxide prepared by calcination having a thermal treatment that includes thermally treating at 350° C.Type: GrantFiled: December 25, 2009Date of Patent: June 24, 2014Assignee: JX Nippon Oil & Energy CorporationInventors: Kazuaki Hayasaka, Motoya Okazaki, Mayumi Yokoi
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Publication number: 20140018454Abstract: A Fischer-Tropsch synthesis reaction catalyst includes a catalyst support containing a silica and zirconium oxide in an amount of 0.5 to 14% by mass based on the mass of the catalyst support, and cobalt metal and a cobalt oxide supported on the catalyst support in an amount equivalent to 10 to 40% by mass of tricobalt tetroxide based on the mass of the catalyst, wherein the degree of reduction of the cobalt atoms is within a range from 75 to 93%, and the amount of hydrogen gas adsorption per unit mass of the catalyst at 100° C. is within a range from 0.40 to 1.0 ml/g.Type: ApplicationFiled: March 14, 2012Publication date: January 16, 2014Applicants: JAPAN OIL, GAS AND METALS NATIONAL CORPORATION, INPEX CORPORATION, NIPPON STEEL & SUMIKIN ENGINEERING CO., LTD., JAPAN PETROLEUM EXPLORATION CO., LTD., COSMO OIL CO., LTD., JX NIPPON OIL & ENERGY CORPORATIONInventors: Yoshiyuki Nagayasu, Hideki Ono, Kazuaki Hayasaka, Mayumi Yokoi
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Publication number: 20110270010Abstract: A first hydroisomerization catalyst contains a support being a extruded product prepared by calcination having a thermal treatment that includes thermally treating at 350° C. or more and at least one metal supported on the support and selected from the group consisting of metals belonging to Groups 8 to 10 of the periodic table, molybdenum and tungsten, wherein the support contains (a1) a calcined zeolite prepared by calcination having a thermal treatment that includes thermally treating at 350° C. or more of an ion-exchanged zeolite obtained by ion exchange of an organic template-containing zeolite containing an organic template and having a 10-membered ring one-dimensional porous structure in a solution containing ammonium ions and/or protons, and (b1) a calcined inorganic oxide prepared by calcination having a thermal treatment that includes thermally treating at 350° C.Type: ApplicationFiled: December 25, 2009Publication date: November 3, 2011Applicant: JX NIPPON OIL & ENERGY CORPORATIONInventors: Kazuaki Hayasaka, Motoya Okazaki, Mayumi Yokoi